Download K-9 Mail APK
Supports installation on external storage.
Target: Android 9.0 (Pie, API 28)
What's new in K-9 Mail
Major redesign of the user interface
Temporarily disabled Push (IMAP IDLE) until we can make it work reliable; your accounts will be polled every 15 minutes instead
Deprecated support for the WebDAV protocol; new accounts can no longer be added
K-9 Mail now requires Android 5.0 and newer
Added support for Autocrypt setup message
Added support for encrypted subjects
Allow installation on external media (Android 6+ with adopted storage)
Removed the broken option to store the message database on external storage
Removed the 'remote control' interface third-party apps could use to change some settings in K-9 Mail
Fixed a lot of bugs and probably introduced some new ones. Please report bugs.
About K-9 Mail
K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures, BCC-self, PGP/MIME & more!
K-9 supports IMAP, POP3 and Exchange 2003/2007 (with WebDAV).
Install the app "OpenKeychain: Easy PGP" to encrypt/decrypt your emails using OpenPGP.
K-9 is a community developed project. If you're interested in helping to make the most popular open source email client on Android even better, please join us! You can find our bug tracker, source code, mailing list and wiki at github.com/k9mail/k-9
We're always happy to welcome new developers, designers, documenters, bug triagers and friends.
If you're having trouble with K-9, please report a bug at github.com/k9mail/k-9 rather than just leaving a one-star review. We don't mind you telling the world that you're frustrated, but if you use our bug tracker, we have a better chance of fixing whatever's giving you a hard time.
You can find K-9's release notes at: bit.ly/new-k9
(People sometimes call K-9: K9, K9 Mail, K-9 Email, K9 Email, K9 E-Mail, k9mail or k9email.)
K-9 Mail 5.700 variants
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
Version:6.901(39001) for Android 5.0+ (Lollipop, API 21)
Uploaded:May 15, 2024 at 4:48PM UTC
File size:9.8 MB
Downloads:41
Version:6.900(39000) for Android 5.0+ (Lollipop, API 21)
Uploaded:May 15, 2024 at 2:48PM UTC
File size:9.8 MB
Downloads:16
Version:6.803(38003) for Android 5.0+ (Lollipop, API 21)
Uploaded:May 10, 2024 at 3:13PM UTC
File size:9.75 MB
Downloads:99
Version:6.802(38002) for Android 5.0+ (Lollipop, API 21)
Uploaded:April 5, 2024 at 6:25PM UTC
File size:9.71 MB
Downloads:243
Version:6.801(38001) for Android 5.0+ (Lollipop, API 21)
Uploaded:March 11, 2024 at 1:17PM UTC
File size:9.64 MB
Downloads:203
Version:6.800(38000) for Android 5.0+ (Lollipop, API 21)
Uploaded:February 29, 2024 at 3:50PM UTC
File size:9.61 MB
Downloads:150
Version:6.717(37017) for Android 5.0+ (Lollipop, API 21)
Uploaded:February 16, 2024 at 6:39PM UTC
File size:9.61 MB
Downloads:87
Version:6.716(37016) for Android 5.0+ (Lollipop, API 21)
Uploaded:February 15, 2024 at 9:21PM UTC
File size:9.61 MB
Downloads:31
Version:6.715(37015) for Android 5.0+ (Lollipop, API 21)
Uploaded:February 11, 2024 at 2:00AM UTC
File size:9.67 MB
Downloads:34
Version:6.714(37014) for Android 5.0+ (Lollipop, API 21)
Uploaded:January 5, 2024 at 1:13PM UTC
File size:9.56 MB
Downloads:95
Version:6.901
Uploaded:May 15, 2024 at 4:48PM UTC
File size:9.8 MB
Downloads:41
Version:6.900
Uploaded:May 15, 2024 at 2:48PM UTC
File size:9.8 MB
Downloads:16
Version:6.803
Uploaded:May 10, 2024 at 3:13PM UTC
File size:9.75 MB
Downloads:99
Version:6.802
Uploaded:April 5, 2024 at 6:25PM UTC
File size:9.71 MB
Downloads:243
Version:6.801
Uploaded:March 11, 2024 at 1:17PM UTC
File size:9.64 MB
Downloads:203
Version:6.800
Uploaded:February 29, 2024 at 3:50PM UTC
File size:9.61 MB
Downloads:150
Version:6.717
Uploaded:February 16, 2024 at 6:39PM UTC
File size:9.61 MB
Downloads:87
Version:6.716
Uploaded:February 15, 2024 at 9:21PM UTC
File size:9.61 MB
Downloads:31
Version:6.715
Uploaded:February 11, 2024 at 2:00AM UTC
File size:9.67 MB
Downloads:34
Version:6.714
Uploaded:January 5, 2024 at 1:13PM UTC
File size:9.56 MB
Downloads:95